SOME transexuals - and a tiny, rare percentage of them - transition from their APPARENT birth gender naturally, per their genetic programming's timing/malfunction (?): http://www.bbc.com/news/magazine-34290981

I was stunned to read of this - children who naturally / unaided transition their physically and long-perceived birth genders, at the onset of adolescence. Also interesting, the research shows them almost all to have strong heterosexual self-identifications, whichever apparent gender they transition from, and then to.

There was a case like that in Pakistan some years ago when apparently three girls in their adolescence grew testes and penises and were then acknowledged as boys.

People treat facts as relevant more when the facts tend to support their opinions. When the facts are against their opinions, they don't necessarily deny the facts, but they say the facts are less relevant or insignificant. This is ofcourse because believing things that make you feel comfortable, takes a priority. And I think that should not be the case if one is after truth.